Dementia With Lewy Bodies

Lewis Body Dementia

  • Shares characteristics of Parkinson’s and dementia
  • Usually sleep more than two hours in the day
  • Visual hallucinations
  • Parkinsonian movements
  • Delusions more common than other types of dementia
  • Syncopal attacks are more common than other types
  • Don’t prescribe antipsychotics – they can make movements worse and result in sudden death

What are Lewy Bodies?

  • Abnormal aggregations of a protein alpha-synuclein.
  • When these develop int he cortex they result in dementia.
  • Alpha-synuclien are also present in brains of Parkinson’s patients but they appear in a different pattern to Lewy Bodies


  • Memory loss and thinking problems similar to Alzheimer’s
  • BUT: more likely to have:
    • Sleep disturbances
    • well-formed visual hallucinations
    • slowness / gait imbalance / other parkinsonian movement features